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Vitamin D is a fat-soluble micronutrient that is naturally present in very few foods. Technically, it is not a vitamin.

Vitamin D is metabolized in the liver and kidneys to become calcitriol, the most powerful seco-steroid hormone in the human body. There are two forms; vitamin D2 and vitamin D3. Vitamin D2 is the form made by plants from the natural sterol ergosterol while D3 is made in the skin of humans and animals from a natural form of cholesterol (7- dehydrocholesterol) and exposure to UVB rays from sunlight.

Two common ways to gain vitamin D are through the consumption of foods such as fatty fish and other foods specifically fortified with vitamin D continue reading…